Problems with Installation NW04 SR1

Hi

i´m new to SAP Products an try to install NW04 SR, ABAP System with MS SQL Server 2005 within a training project. During the installation routine the systems shows the following error:

ERROR 2007-11-07 13:18:07

lib=iamodmssql module=CIaNtMssDmo

MDB-05053 Errors when executing sql command:

If this message is displayed as a warning - it can be ignored. If this is an error - call your SAP support

Has anybody an idea how i can fix this problem? The SQL Server is running and the Central Instance installation worked fine so far.